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@InProceedings{mcelderry:napac2019-tupls12,
author = {A. McElderry and B. Billett and J.A. Carter and K.J. Wakefield},
title = {{Final Design of NEG-Coated Aluminum Vacuum Chambers \& Stainless Steel Keyhole Vacuum Chambers for the APS-U Storage Ring}},
booktitle = {Proc. NAPAC'19},
pages = {480--482},
paper = {TUPLS12},
language = {english},
keywords = {vacuum, storage-ring, photon, radiation, quadrupole},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-TUPLS12},
url = {http://jacow.org/napac2019/papers/tupls12.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLS12},
abstract = {The APS-Upgrade storage ring features a diverse group of vacuum chambers which includes eight NEG (non-evaporable getter) coated aluminum chambers and two copper coated stainless steel keyhole-shaped chambers per sector (40 total). Each chamber contains a 22 mm diameter electron beam aperture; the keyhole chambers also include a photon extraction antechamber. The chambers vary in length of approximately 289 ’ 792 mm and fit within the narrow envelope of quadrupole and sextupole magnets. Each design is a balance of functionality, manufacturability, and installation space. An innovative CAD skeleton model system and ray tracing layout accurately determined synchrotron radiation heat loads on built-in photon absorbers and the internal envelope of the keyhole antechamber. Chamber designs were optimized using thermal-structural FEA for operating and bakeout conditions. The group of chambers require complex manufacturing processes including EDM, explosion-bonded metals, furnace brazing, and welding with minimal space. This paper describes the design process and manufacturing plan for these vacuum chambers including details about FEA, fabrication plans, and cooling/bakeout strategies.},
}